William H. Osborne - 21 Nov 2025 Form 4 Insider Report for ARMSTRONG WORLD INDUSTRIES INC (AWI)

Role: Director
Signature: /s/ Alan M. Kidd, Attorney-in-fact
Issuer symbol: AWI
Transactions as of: 21 Nov 2025
Net transactions value: $0
Form type: 4
Filing time: 24 Nov 2025, 16:40:57 UTC
Previous filing: 11 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Osborne William H	Director	C/O ARMSTRONG WORLD INDUSTRIES, INC., 2500 COLUMBIA AVENUE, LANCASTER	/s/ Alan M. Kidd, Attorney-in-fact	24 Nov 2025	0001445187

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AWI	Common Stock	Gift	$0	-300	-7.1%	$0.000000	3,941	21 Nov 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes vested and unvested units as well as units not yet acquirable by the Director. Under the terms of the 2016 Directors Stock Unit Plan, as amended (the "2016 Plan"), vested units under the 2016 Plan are not acquirable by the Director until, at the election of the Director: (i) the vesting of the units at the one-year anniversary of the grant or (ii) the time of the Director's termination of service.

Content

Includes vested and unvested units as well as units not yet acquirable by the Director. Under the terms of the 2016 Directors Stock Unit Plan, as amended (the "2016 Plan"), vested units under the 2016 Plan are not acquirable by the Director until, at the election of the Director: (i) the vesting of the units at the one-year anniversary of the grant or (ii) the time of the Director's termination of service.